Which statement about environmental sampling in healthcare facilities is true?

• A. Targeted environmental sampling during an outbreak should only be performed if advised by the local jurisdiction or health department.
• B. Routine or random, directed microbiological culturing of air, water, and environmental surfaces in healthcare facilities is not recommended.
• C. Routine culturing is indicated for specific quality control purposes, such as biological monitoring of sterilizers using bacterial spores and cultures of water and dialysate in hemodialysis units.
• D. Environmental sampling should be performed upon completion of construction projects.

Answer: (C)

Environmental sampling in healthcare is about quality control of critical processes, not blanket surveillance. The best statement reflects that routine culturing is used for specific quality-control purposes, such as using biological indicators (spore tests) to verify that sterilizers are effectively killing organisms and testing water and dialysate quality in hemodialysis units. This ensures patient safety by confirming sterilization processes work and that water quality meets standards.

Other options don’t fit as well because sampling during an outbreak is typically directed by public health guidance and internal protocols rather than a blanket rule; routine random culturing of air, water, and surfaces isn’t a universal recommendation since it can be impractical and may yield ambiguous results; and post-construction sampling is done in certain risk-based scenarios or during commissioning, not as an unconditional requirement for all facilities.